402422020 has 96 divisors (see below), whose sum is σ = 1134717696. Its totient is φ = 115776000.

The previous prime is 402421997. The next prime is 402422023. The reversal of 402422020 is 20224204.

It is a junction number, because it is equal to n+sod(n) for n = 402421985 and 402422003.

It is not an unprimeable number, because it can be changed into a prime (402422023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9970 + ... + 30070.

It is an arithmetic number, because the mean of its divisors is an integer number (11819976).

Almost surely, 2^402422020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402422020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (567358848).

402422020 is an abundant number, since it is smaller than the sum of its proper divisors (732295676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402422020 is a wasteful number, since it uses less digits than its factorization.

402422020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20141 (or 20139 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 402422020 is about 20060.4591173781. The cubic root of 402422020 is about 738.2904412247.

Adding to 402422020 its reverse (20224204), we get a palindrome (422646224).

The spelling of 402422020 in words is "four hundred two million, four hundred twenty-two thousand, twenty".